Audio Classification.
We evaluate the audio representation from \(f_{a}(\cdot )\)  on ESC50 [1]}, DCASE2013 [2]} and DCASE2014 [2]} benchmarks by quickly training a linear classifier.
ESC50 contains 2K audio clips from 50 different classes.
DCASE2013 and DCASE2014 contain 100 training clips from 10 different classes.
For each audio in ESC50, we sample 10 clips of 2-second length for training, and average the predicted scores of sampled 10 clips for testing.
For DCASE2013 and DCASE2014, we extract 60 clips of 1-second length for training and testing.
